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• This study was undertaken to compare the efficacy and safety of 'Levim liraglutide' biosimilar to the original reference drug. • The primary efficacy endpoint was mean change in reduction in HbA1c% from baseline at week 24 compared with reference liraglutide. • Analysis for treatment difference showed non-inferiority for Levim liraglutide at margin of 0.4 % and one-sided alpha of 0.025. • The secondary endpoints and safety profiles were also comparable, thus demonstrating biosimilarity of Levim liraglutide. Liraglutide is indicated for glycaemic control in adults with Type 2 diabetes mellitus (T2DM) as an adjunct to diet and exercise. A proposed biosimilar of liraglutide (Levim Liraglutide) was investigated for efficacy & safety in a phase 3 study against the originator reference liraglutide (Victoza®) manufactured by Novo Nordisk A/S, Denmark. Patients aged 18–65 years of age with glycosylated hemoglobin (HbA1c) between 7 and 10 %, among other criteria, were included in the study. Patients were randomized 1:1 to receive daily doses of either Levim liraglutide or reference liraglutide for 24 weeks. The least square mean (standard error, SE) for the primary efficacy endpoint of reduction in HbA1c% at Week 24 was −1.09 (0.15)% for Levim liraglutide group and −1.04 (0.14)% for reference liraglutide. The upper bound of the confidence interval for treatment difference was less than the non-inferiority margin of 0.4 % at one-sided alpha of 0.025 (P-value = 0.0003). The secondary endpoints for proportion of patients achieving reduction in HbA1c, glycaemic level and weight, changes in cardiovascular parameters and the overall safety profiles of the study drugs were comparable. Levim liraglutide demonstrated non-inferior efficacy and similar safety to reference liraglutide and may be an option in treatment of T2DM (CTRI.nic.in , no. CTRI/2022/02/040261). [ABSTRACT FROM AUTHOR]